Miele Oven Error Code F194

F194 indicates that the bottom heat Pt1000 temperature sensor (R30/22) or its wiring harness is open-circuited. This means the control board is receiving no signal from the sensor that monitors the lower heating zone. The oven cannot safely regulate bottom heat without this reading, so it shuts down and displays the fault code.

No, it is not safe to continue using the oven with F194 active. The fault means the control board cannot monitor bottom heat temperatures, which removes a key safeguard against overheating. Operating the oven in this condition risks uncontrolled temperature conditions and potential damage to the appliance.

Repair costs vary depending on what is at fault. If the issue is a loose or corroded connector, the cost may be limited to a service call fee, typically in the range of $100 to $200. If the Pt1000 sensor needs replacement, parts and labor together commonly range from $150 to $400 depending on the specific model and local labor rates. Wiring harness replacement can fall on the higher end of that range or beyond, depending on how much of the harness is affected.

A knowledgeable DIYer can start by checking the wiring harness and connectors for visible damage or loose connections, which sometimes resolves the fault without parts. Testing the Pt1000 sensor with a multimeter requires basic electrical knowledge and access to the sensor location. If the sensor itself has failed, replacing it involves disassembling part of the oven interior, which many owners prefer to leave to a certified technician.

A reset may temporarily clear the displayed code, but F194 will return as soon as the control board attempts to read the sensor again and detects the open circuit. The underlying wiring or sensor fault must be physically repaired before the error will clear permanently.